TY - JOUR N2 - Liquid-gas flows in pipelines appear in many industrial processes, e.g. in the nuclear, mining, and oil industry. The gamma-absorption technique is one of the methods that can be successfully applied to study such flows. This paper presents the use of the gamma-absorption method to determine the water-air flow parameters in a horizontal pipeline. Three flow types were studied in this work: plug, transitional plug-bubble, and bubble one. In the research, a radiometric set consisting of two Am-241 sources and two NaI(TI) scintillation detectors have been applied. Based on the analysis of the signals from both scintillation detectors, the gas phase velocity was calculated using the cross-correlation method (CCM). The signal from one detector was used to determine the void fraction and to recognise the flow regime. In the latter case, a Multi-Layer Perceptron-type artificial neural network (ANN) was applied. To reduce the number of signal features, the principal component analysis (PCA) was used. The expanded uncertainties of gas velocity and void fraction obtained for the flow types studied in this paper did not exceed 4.3% and 7.4% respectively. All three types of analyzed flows were recognised with 100% accuracy. Results of the experiments confirm the usefulness of the gamma-ray absorption method in combination with radiometric signal analysis by CCM and ANN with PCA for comprehensive analysis of liquid-gas flow in the pipeline. L1 - http://www.journals.pan.pl/Content/118926/PDF/art09.pdf L2 - http://www.journals.pan.pl/Content/118926 PY - 2021 IS - No 1 EP - 159 DO - 10.24425/mms.2021.135997 KW - two-phase flow KW - void fraction KW - gamma-ray absorption KW - flow regime identification KW - artificial neural network A1 - Hanus, Robert A1 - Zych, Marcin A1 - Mosorov, Volodymyr A1 - Golijanek-Jędrzejczyk, Anna A1 - Jaszczur, Marek A1 - Andruszkiewicz, Artur PB - Polish Academy of Sciences Committee on Metrology and Scientific Instrumentation VL - vol. 28 DA - 2021.03.31 T1 - Evaluation of liquid-gas flow in pipeline using gamma-ray absorption technique and advanced signal processing SP - 145 UR - http://www.journals.pan.pl/dlibra/publication/edition/118926 T2 - Metrology and Measurement Systems ER -